Epidemiology and control of influenza A(H1N1)v in the Netherlands: the first 115 cases

S Hahné; T Donker; A Meijer; A Timen; J van Steenbergen; A D Osterhaus; M van der Sande; M Koopmans; J Wallinga; R Coutinho; Collective the Dutch New Influenza A(H1N1)v Investigation Team

doi:10.2807/ese.14.27.19267-en

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Epidemiology and control of influenza A(H1N1)v in the Netherlands: the first 115 cases
S Hahné¹ , T Donker¹ , A Meijer¹ , A Timen¹ , J van Steenbergen¹ , A D Osterhaus² , M van der Sande¹ , M Koopmans¹ , J Wallinga¹ , R Coutinho¹ , Collective the Dutch New Influenza A(H1N1)v Investigation Team³
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Affiliations: ¹ Rijksinstituut voor Volksgezondheid en Milieu (RIVM, National Institute for Public Health and the Environment), Bilthoven, the Netherlands ² Erasmus Medical Centre, Rotterdam, the Netherlands ³ The members of the team are listed at the end of the article

Correspondence:
S Hahné
Susan.Hahne rivm.nl
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Citation style for this article: Hahné S, Donker T, Meijer A, Timen A, van Steenbergen J, Osterhaus A D, van der Sande M, Koopmans M, Wallinga J, Coutinho R, the Dutch New Influenza A(H1N1)v Investigation Team Collective. Epidemiology and control of influenza A(H1N1)v in the Netherlands: the first 115 cases. Euro Surveill. 2009;14(27):pii=19267. https://doi.org/10.2807/ese.14.27.19267-en Received: 06 Jul 2009

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Abstract

Introductions of the new influenza A(H1N1) variant virus in the Netherlands led to enhanced surveillance and infection control. By 24 June 2009, 115 cases were reported, of whom 44% were indigenously acquired. Severity of disease is similar to reports elsewhere. Our point estimate of the effective reproductive number (Re) for the initial phase of the influenza A(H1N1)v epidemic in the Netherlands was below one. Given that the Re estimate is based on a small number of indigenous cases and a limited time period, it needs to be interpreted cautiously.